I think that is a response based upon the dark UI pattern of the site. If you want to view a profile, they force you to register. Hence the user clicks on a

I think that is a response based upon the dark UI pattern of the site. If you want to view a profile, they force you to register. Hence the user clicks on a profile, gets a registration form, and fills it out in a bad mood, since they are being forced register to continue when they don't want to. Hence "fuckyou" or "fuckoff" becoming their password choice. It would be interesting to see what email addresses these specific users gave. Possibly throwaways that use equally fruity names?